Gene Regulation Welcome to your Gene regulation question series In the absence of the lactose genes of lac operon are Activated Induced Repressed Constitutively expressed None In which of the following condition the transcription of trp operon will be stopped, When charged tryptophan tRNA (Trp-tRNATrp) concentration is high and sequence 3 base pairs with sequence 2 When charged tryptophan tRNA (Trp-tRNATrp) concentration is high and sequence 2 is unavailable for pairing When sequence 4 is unavailable as a result of pairing between sequence 2 and 3 When there is no requirement of protein synthesis None Which of the following is true about operon Genes are clustered on the chromosome May produce polycistronic RNAs Can be operated by a single promoter All of the above None In zinc finger motif zinc elements interacts with Hydrophobic interaction Coordinate bond Cross linking Hydrogen bon None In trp operon transcription in which of the following condition sequence 2 will pair with sequence 3 At low charged tryptophan tRNA (Trp-tRNATrp) concentration When of ribosomes stall at sequence 1 Sequence 2 is available for pairing All of the above. None Which of the following is true for genes in the operon Each gene has an independent promoter Each gene has its own ribosome binding site All the genes need separate activation All of the above None Which of the following genes are not required to be governed by the operon Genes of glycolytic pathway Genes of larger protein complex Genes with co-ordinated function Genes essential under specific condition None How does lactose promotes the expression of lac operon By inhibiting the expression of the glycolytic genes By binding to the promoter of the lac operon By binding to the lac repressor Inducing expression of gene I None Which of the following is a sign of an active chromatin region Positioning of nucleosomes Presence of histone variant proteins And Covalent modification of histone All of the above None Prokaryotic and eukaryotic organism share regulatory genes sequences. True Flase None What are aptamers Oligonucleotides Oligopeptides Oligosaccharides Multi-protein complex None Which of the following is not true about operon Genes are clustered on the chromosome May produce polycistronic RNAs Can be operated by a single promoter Each gene of the operon is regulated independent promoter None Time's up
